Rivet-spinning machine.



W. P. SENG. RIVET SPINNING MACHINE. APPLIO4TION FILED Imus. 1909.

939,559. Patented Nov. 9, 1909.

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tional view, illustrating 'a mo tllfllIlVGIltlOIl.

WENDELIN P. SENG,.OF CHICAGO, ILLINOIS.

nIvEr-srmmnsr MACHINE.

Specification of Letters Patent.

Application filed February 15, 1909. Serial No. 478,080;

To all whom it may concern: I

Be it knownthat I, WENDELIN P. SENG, a citizen of the United States, residing at Chicago, in the county of Cook and State of lllinois,'have invented certain Improvements in Rivet-Spinning Machines, of which the following is a. specification.

This invention is an improvement in rivet ing machines, of thatparti'cular class which are provided with a rotary tool, comprising a rotatable spindle having ahead carrying a pair of grooved rollers operating to swage v force theboltor axle.

a head upon the end of the rivet as the spindle is moved to press the rollers against said a their inner edges with grooves 7, which corivet. In the operation of. this type of machine the rollers are subjected to considerable lateral strain which results in excessive friction between the sides of the rollers and walls of the spindle-head, preventing the rollers from turnln and thereby causing uneven wear on their working surfaces, as

well as strain on the bearings of the machine, and heating of the rivet.

' The primary object of my present invention, therefore, is to provide an arran' ement for mounting the rollers in the spind e-head so as to reduce the friction of the parts toa minimum and thus permit theswaging r011 ers to freely turn duringthe riveting opera I tion.

With this principal object in view my invention conslstsm the articular construc-' tion and arrangement 0 the parts of a rotary tool for rivet spinning machines, as'

hereinafter fully described and specifically set forth in the appended claims.

'In the accompanyi g drawings, which form a part of this specification-Figure l is a side elevation of a rotary tool for rivet spinning machines, constructed in accordance with .my present invention. Fig. 2 is a vertical transverse'sectional view through. the tool. Fig. 3 is a vertical sectional view on the line 33 of Fig. 2. Fi dis a secdification of Like numerals of reference indicate like parts in all the'figures of the drawings.

In carryin out my invention the head- 1 of the spm'd e is provided with depending ears or bearin s 2 2, to receive the bolt or axle 3 upon W ich the swaging rollers 4 4 ..compris1ng a spindle, swaglng rollers Jourare mounted between said ears. In the resconvergeslightly so that the rollers 4 will be disposed at an inclination from each other, as shown in the drawings, said rollers meetni'g, approximately, at their lower ends and are separated at their upper ends by means of a tapered division plate 5, the latter depending from the upper part of the spindle headintermediate the ears. The tapered dig'vision plate 5 is notched at its lower end, as at'6, to receive the bolt .or axle, whereby said plate not only serves to separate the upper ends of the rollers but alsoto rein- -The rollers 4 are provided peripherally at operate to produce a head on the end of the rivet of the desired shape.

In the operation of a tool of this charactween these parts the outer side of each roller is provided with an annular recess or chanhe], 8, in which a set of balls, 9, are placed to form ball-bearings between the swaging rollers and'ears of the spindle-head.

It will be understood, of course, that the openings through the rollers, to receive, the bolt or axle, are slightly enlarged to permit the rollers to be disposed at opp0s1te inclinations, as shown, audit will be seen that assaid rollers meet at their lower ends the end of the rivet is headed or rounded corresponding with the shape of the coiiperating grooves in the swaging rollers.

Instead of separatin r the upperendsof the rollers by means 0 a division plate, as hereinbefore described, other means may be employed for the purpose. In the modification shown in Fig. 4 I have shown the employment of a ball, as 10, to take the place of the division plate, and in this instance the ball is of such a size as to bear within the peripheral grooves 7 of the swaging rollers, said ball being seated in a concave recess, 11. in the spindle-head.

Havingthus described my invention, what Iclaim' as new and desire to secure by Letters-Patent, is

1. A rotary tool for riveting machines,

naled therein on a single axle, means for Patented Nov. 9,1909.

in the race-ways to bear against the aforeseparating the rollers within the spindle, and means for bringing the rollers together at the outer end of the spindle,

2. A rotary tool for riveting machines, comprising a spindle having a head with outwardly converging walls, swaging rollers journaled in' the spindle-head between the converging walls and disposed at opposite inclinations, separating means between the inner ends of the rollers, and anti-friction devices between the sides of the rollers and aforesaid Walls of the spindle-head.

3. A rotary tool for riveting machines, comprising a spindle having ahead with outwardly converging walls, swaging rollers jonrnaled in the spindle-head between the converging walls on a single axle and disposed at opposite inclinations, separating means between the inner ends of the rollers, annular channels or race-ways in the outer sides of therollers, and anti-friction balls said walls of the spindle-head, substantially as shown and described.

4. A rotary tool for riveting machines, comprising a spindle having a head with outwardly converging walls, an axle extending between said walls, swaging rollers journa ed in the spindle-head between the con verging walls on said axle and disposed at opposite inclinations, and a tapered division plate projecting from the spindle-head into the space between the rollers at the inner ends of the latter.

5. A rotary tool for riveting machines,

comprising a spindle, having outwardly converging walls, a bolt or axle extending between said walls, swaging rollers journaled on the bolt or axle and disposed at opposite inclinations, and a tapered wall projecting from the spindle into the space between the rollers and engaging the bolt or axle, substantially as shown and described.

6. A rotary tool for riveting machines. comprising a spindle having converging walls, a bolt or axle extending between said walls, swaging rollers journaled on the belt or axle between said walls and oppositely inclined, a tapered wall projecting from the spindle into the space between the rollers and engaging the belt or axle at. the center thereof, and anti -friction devices between the sides of the rollers and walls of the spindle. substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK J. Sens, Flow. l. Sonaenn. 

